1. National Institute for Health and Care Excellence. Gingivitis and periodontitis. Online information available at
www.evidence.nhs.uk/topic/gingivitisandperiodontitis
(accessed April 2015).
2. British Society of Periodontology. Young practitioners guide to periodontology, 2nd edition. Online information available at
http://www.bsperio.org.uk/publications/downloads/Young_Practitioners_Guide.pdf
(accessed April 2015).
3. Dental Protection. Periodontal monitoring. 2014. Online information available at
http://www.dentalprotection.org/new-zealand/publications-resources/clinical-audit-tools/clinical-audit-tools-display/2014/08/27/periodontal-monitoring
(accessed April 2015).
4. Manresa C, Sanz E, Bravo M, Echeverría J J . Interventions for the maintenance of the dentition in patients treated for periodontal disease. Cochrane Database Syst Rev 2011; 10: CD009376.
5. Renz A, Ide M, Newton T, Robinson P, Smith D . Psychological interventions to improve adherence to oral hygiene instructions in adults with periodontal diseases. Cochrane Database Syst Rev 2007; 2: CD005097.